Improvement in dies for forming wrench-bars



A. 6.60128. Dies fnrForming Wr'snch-Bars, &fc.

Patenxedsepnzbws.;

UNITED STATES PATENT OFFICE.

AURY G. GOES, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN DIES FOR FORMING WRENCH-BARS, &c.

Specification forming part of Letters Patent No. 167,825, datedSeptember 21, 1875; application led August 11, 1875.

To all whom it may conce/rn:

Beit known that I, AURY G. Cons, of the city and county of Worcester andState of Massachusetts, have invented certain ynew and usefulImprovements in Dies for Forming Wrench-Bars, and for similar purposes;and I do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, which form-a part of this specication, and in which- Figure 1represents a perspective view of one part of a forming-die embracing myimprovement. Fig. 2 represents a transverse vertical section of the dieswhen closed together.

In the manufacture of wrenches, which are to be Iinished by grinding andpolishing, it is necessary, for the production of good work, that thecorners ofthe wrench-bars should be -formed full and complete, in orderthat the bars, in finishing, may be ground square and with perfectangles without the waste and labor of removing much metal from theirsurfaces, and that all portions thereof maybe properly polished, leavingno unfinished spots or scars, which the grinding and polishing wheelshave failed to reach.

With the forming-dies heretofore used it has been found difficult in allcases to forge the bars full and perfect, owing tothe liability of dustand scales from the iron lodging in the corners of the dies, and therebypreventing the metal from receiving a perfect impression from the die.To obviate this objection, and to provide dies which shall at all timesbe free from the lodgment of scales is the object of my invention, whichconsists in combining with the matrix of the die a small inlet-passageextending longitudinally along the angle of the matrix, through whichinlet I introduce a current of liquid o r a blast of air, by means ofwhich the matrix is swept clean, and the accumulation of any dust orscales is prevented.

ism in the ordinary manner.

In the drawings, A denotes the body ofthe dies. B indicates thematrices, in which the bars are compressed and formed, the dies A beingoperated by a press or drop mechan- U C indicate inlet-passagesextending into the body of the die and communicating with the interiorof the matrices B by narrow longitudinal openings, D, entering along theangle in a direction parallel with, or continuous with, one of thesurfaces or sides of the matrix. C indicates pipes or tubescommunicating with the passages C, and leading from a suitable reser-`voir or blower, which latter is not herein shown.

Water, steam, or air may be forced into the interior of the matricesthrough the openings D and passages O, thereby removing all scales ordust from thel surfaces while the dies are in operation.v The openings Din the upper and lower portions of the dies enter at differentdirections, one set parallel with the narrow surfaces, and the other setparallel with the broad surfaces ofthe matrices, so that as the bars areturned in different positions during the process of forging the severalcorners will be successively brought in contact with the enteringcurrent, which removes any loose scale from the bars and throws it fromthe matrix Without permitting it to fall and lodge in the corner of thedie.

Having described my improvement in dies for forming wrench-bars, what Iclaim therein as new and of my invention, and desire to secure byLetters Patent, is y The improved forming-dies A, having passages O C,with longitudinal openings Dv at the angles of the matrices,substantially as and for the purposes set forth.

AURY G. GOES.

Witnesses GHAs. H. BURLEIGH, l S. R. BURTON.

